SDCC Read/Write EEPROM At89c51ed2

[Rafael Lopes]

Hi! 
I am using the Mic At89c51ed2 and programing with SDCC. This device have 2k of a internal eeprom. But I have Problems ta acess this eeprom… 
I wrote the code like this: 
unsigned char __xdata __at(0x00) texto; //creating a variable texto 

//to read th eprom I wrote a code like this 
EA = 0; //turn off the interrupts
EEE = 1; //Active the EEE bit of ECON register, to read texto in the eeprom 
data = texto; //read the EEPROM in the position 01 
EEE =0; //turn off the EEE bit of ECON register 
EA = 1; //turn ON the interrupts 

//to write th eprom I wrote a code like this
EA = 0; //turn off the interrupts
EEE = 1; //Active the EEE bit of ECON register, to read texto in the eeprom 
texto = data; //write the EEPROM in the position 01 
EEE =0; //turn off the EEE bit of ECON register 
EA = 1; //turn ON the interrupts 

But this dont work, the data don’t remains… In other words, the data is not write/read in the eeprom… 
In the begining of the code, I am using “xdata” to access the external memory and “Set” the “EEE” to write in the eeprom. You know a diferente sentence of Storage Class Extensions to create variables in the internal eeprom? Someone can Help me? 

Thanks, 

Rafael Lopes

[Jason Jordon]

you haven’t interfaced any LCD to the circuit??

[Author]

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